package com.kuson.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.kuson.springcloud.entities.CommonResult;
import com.kuson.springcloud.entities.Payment;
import com.kuson.springcloud.myHandler.CustomerBlockHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @SentinelResource注解的学习 1.配置这个接口路径为资源路径配置访问
 * 没有配置访问接口：{"code":200,"message":"按资源名称限流测试OK","data":{"id":2020,"serial":"serial001"}}
 * 配置数据：
 * 在@SentinelResource注解中配置的监控的byResource资源名称配置流量控制，如果超过了配置的阈值就走我们自定义的兜底方法
 */
@RestController
public class RateLimitController {

    @GetMapping("/byResource")
    @SentinelResource(value = "byResource", blockHandler = "handleException")
    public CommonResult byResource() {
        return new CommonResult(200, "按资源名称限流测试OK", new Payment(2020L, "serial001"));
    }

    //兜底的方法
    public CommonResult handleException(BlockException exception) {
        return new CommonResult(444, exception.getClass().getCanonicalName() + "\t 服务不可用");
    }

    /**
     * 按照url的方式配置限流方式
     *
     * @return
     */
    @GetMapping("/rateLimit/byUrl")
    @SentinelResource(value = "byUrl")
    public CommonResult byUrl() {
        return new CommonResult(200, "按url限流测试OK", new Payment(2020L, "serial002"));
    }

    /**
     * 发生错误的时候，用户自定义返回错误逻辑
     * @return
     */
    @GetMapping("/rateLimit/customerBlockHandler")
    @SentinelResource(value = "customerBlockHandler",
            blockHandlerClass = CustomerBlockHandler.class,
            blockHandler = "handlerException2")
    public CommonResult customerBlockHandler()
    {
        return new CommonResult(200,"按客戶自定义",new Payment(2020L,"serial003"));
    }

}
